Changes in Accumulated Other Comprehensive Income by Component (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (11,392)	$ (13,090)	$ (12,238)
Net sales	1,262,006	1,091,566	928,780
Income from continuing operations before income taxes	166,500	107,574	92,262
Tax benefit	(45,959)	(35,253)	(12,432)
Income from continuing operations	120,541	72,321	79,830
(Loss) income from discontinued operations, net of income taxes	(2,171)	198,206	15,419
Total reclassifications in the period	118,370	270,527	95,249
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Loss) income from discontinued operations, net of income taxes	0	(4,143)
Total reclassifications in the period	(7,989)	(13,957)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from continuing operations before income taxes	(1,277)	(117)
Tax benefit	416	156
Income from continuing operations	(861)	39
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Interest Rate Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(886)	(850)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Foreign Exchange Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	(391)	733
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension and Other Postretirement Benefit Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from continuing operations before income taxes	(10,505)	(14,870)
Tax benefit	3,377	5,017
Income from continuing operations	(7,128)	(9,853)
Amortization of prior-service credits, net	223	254
Amortization of actuarial losses	(9,634)	(17,369)
Curtailment gain (net)	(223)	2,882
Settlement loss	(871)	(637)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	0	0
(Loss) income from discontinued operations, net of income taxes	$ 0	$ (4,143)